CN2699136Y - Vortex pulverized coal burner - Google Patents
Vortex pulverized coal burner Download PDFInfo
- Publication number
- CN2699136Y CN2699136Y CN 03218917 CN03218917U CN2699136Y CN 2699136 Y CN2699136 Y CN 2699136Y CN 03218917 CN03218917 CN 03218917 CN 03218917 U CN03218917 U CN 03218917U CN 2699136 Y CN2699136 Y CN 2699136Y
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- CN
- China
- Prior art keywords
- wind
- sleeve pipe
- inspissator
- pipe
- air
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- Expired - Lifetime
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Abstract
The utility model discloses a vortex coal powder burner. A first air pipe is communicated with a first air nozzle by an inlet elbow of first air passing through a straight pipe section of first air and the center of the first air pipe is provided with a center pipe. The inner portion of the first air nozzle is provided with a sleeve pipe and the inner portion of the first air nozzle and the circle passage between the sleeve pipe and the first air nozzle are provided with a burning stabilizer. The burning stabilizer comprises the cone posts whose heights are gradually increased towards the direction of the first air nozzle along the axle direction uniformly arranged on the outer wall of the sleeve pipe. The post bodies of the cone posts form wave peaks and the space between two contiguous wave peaks forms a wave trough. The outer wall of the center pipe on the inlet portion of the sleeve pipe is provided with a concentrator which is a ring body surrounding the center pipe. The utility model solves the technical problems of high cost, large workload on equipment modification and easy damage on the equipment component in the background art. The high efficient burning of the coal powder is realized and also the coal type adaptability is improved and the combustion supporting oil of underload is saved. The structure is simple, the improvement expense is cheap and the implementation is easy.
Description
Technical field
The utility model relates to a kind of vortex burner.
Background technology
Coal is the main energy sources of China, though rich coal resources in China, coal is changeable, ature of coal is relatively poor, and coal consumption rich and influential family---power industry to the basic demand of coal dust firing is: efficient and steady combustion.Coal dust firing also influences to environmental protection.Turbulent burner occupies certain ratio at China's station boiler and other coal dust firing field, characteristics are that each burner is an independently fuel element, independently finish catching fire, surely fire and burning of breeze airflow, it can be divided into three kinds of scroll casing type, tangential vane formula and axial blade formulas by the mode that produces eddy flow.Along with the development of combustion technology, burner produces the combination of the aforementioned often three kinds of forms of mode of eddy flow on the large-sized boiler, one time wind mostly is direct current, also or weak eddy flow arranged; Secondary wind has monocycle, two kinds of patterns of dicyclo.Dicyclo is the inner and outer rings structure, can regulate swirl strength by governor motion separately.The center of a wind has if do not establish central air hose, and the end of central air hose has if do not establish and to expand flow cone.Turbulent burner work is to rely on the feedback heat of high temperature recirculation zone as the stable thermal source of pulverized coal flame, make breeze airflow timely the smooth combustion of fighting.Breeze airflow is through airduct, when spout enters burner hearth, because the centrifugal action a when wall attachment effect and a wind rotation, pulverized coal particle is many slightly and the center is few slightly near the appearance of primary air jet, presents from the primary air jet center radially the concentration field that granule number from inside to outside increases gradually.Rotated secondary wind and swept along effect, near the primary air jet appearance pulverized coal particle is carried rotation and away from the high-temperature region, the coal powder density distribution is distributed with gas flow temperature not to match, do not have formation to be beneficial to the stable high temperature of pulverized coal flame, area with high mercury, thereby be unfavorable in time catching fire and flame stabilization of breeze airflow.When ature of coal difference and underrun, it is combustion-supporting usually need to throw oil.
Common turbulent burner, primary and secondary air is mixed strong, temperature peak height, thereby NO
xGrowing amount is big, according to surveying its NO
xBe about 500 ~ 600PPm.
A kind of radially deep or light vortex burner, China Patent No.: 93 2 44359.1, a kind of vortex burner is disclosed, though its burner low-load combustion-stabilizing ability is stronger, but its inspissator is easy to wear, expands the flow cone easy burn-out, thereby influence is as the long-term usability of main burner.This vortex burner belongs to secondary wind and is single ring architecture, the spout center is provided with the expansion flow cone, though add a stripper loop in the example 2, secondary air separating is the outer secondary wind of the ring of secondary wind, direct current in the ring of rotation, qualitative difference is arranged but this and secondary wind are the vortex burner aerodynamic structure of twin nuclei.And it is that secondary wind is that the burner of dicyclo is not generally established central air hose that two on the big unit transfer wind, even there is the central air hose end also not have the expansion flow cone, if reforming equipment like this, the retrofit work amount is big, the cost height.
The utility model content
It is fragile that the utility model has solved in the background technology part of appliance, and the scrap build workload is big, the technical problem that cost is high.
Technical solution of the present utility model is:
A kind of vortex burner comprises the wind passage, interior secondary air channel 13, outer secondary air channel 10 3 parts that are communicated with successively; A described airduct is communicated with a wind snout 1 through a wind straight length 6 by a wind inlet elbow 7, a described airduct center is provided with central tube 5, described wind snout 1 place is built-in with sleeve pipe 3, its special character is: in the described wind snout 1, the annular flow path place of 1 of sleeve pipe 3 and wind snout is provided with stabilizer 2, this stabilizer 2 by be distributed on sleeve pipe 3 outer walls, vertically, the awl post 16 that raises gradually to wind snout 1 direction height constitutes, the cylinder of described awl post 16 constitutes crest 8, two 8 adjacent on crests and forms trough 9; The outer wall of the central tube 5 of described sleeve pipe 3 porch is provided with inspissator 4, and this inspissator 4 is the ring bodies that are surrounded on the central tube 5.
The most significant end face of above-mentioned awl post 16 can be concordant with the vents face of a wind snout 1 or be embedded in wind snout 1.
It is the ring bodies that triangle or streamlined form around central axis that above-mentioned inspissator 4 can adopt trace.
The annular solid that forms for the sand dune shape with the trace of above-mentioned inspissator 4 is best.
The position of above-mentioned inspissator 4 can be with the mobile adjusting of central air hose 5.
In the above-mentioned central air hose 5 oil gun, burning torch, flame monitoring device etc. can be set.
The utlity model has following advantage:
1. oil gun is set in the central tube can realizes few oil band powder ignition trigger, reach fuel-efficient purpose;
2. realize multistage concentrating, the first order is that the bump separation of inspissator concentrates, and the second level is concentrating of stabilizer, and the third level is that pneumatic suction concentrates.The high concentration pulverized coal air-flow that concentrates in trough through stabilizer directly enters the high temperature recirculation zone of big recirculating zone boundary vicinity, forms the favourable district that catches fire to high concentration pulverized coal air-flow Fast Heating, because of this zone oxygen concentration is lower, is anoxic, thereby can effectively suppresses NO
xGeneration, realize the clean combustion of coal, the steady combustion of its underload de-oiling is very capable, can realize the efficient burning of coal dust, has strengthened coal adaptability simultaneously, saves underload and helps fuel oil.
3. ring-like inspissator has adopted the very little streamlined sand dune shape of resistance, makes that inspissator can be synchronous with overhaul; The axial angle of stabilizer is very little, and is less to the resistance of breeze airflow, thereby wearing and tearing are very light, can satisfy the basic instructions for use of an overhaul life of power plant.
4. simple in structure, improvement expenses is cheap, easy to implement.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is that A of the present utility model is to view.
Wind snout of drawing reference numeral: 1-, 2-stabilizer, 3-sleeve pipe, the 4-inspissator, 5-central tube, wind straight length of 6-, a wind inlet of 7-elbow, 8-crest, 9-trough, the outer secondary air channel of 10-, the outer secondary wind of 11-is transferred wind mechanism, the outer secondary wind inlet of 12-, secondary air channel in the 13-, secondary wind inlet in the 14-, secondary wind is transferred wind mechanism in the 15-, and 16-bores post.
The specific embodiment
Referring to Fig. 1, spurt into burner hearth behind the wind inlet elbow 7 of the breeze airflow that comes from wind passage by coal burner, wind straight length 6, a wind snout 1, its cross section is all rounded; Inside and outside secondary wind is all spurted into burner hearth in circular rotating jet mode after transferring wind mechanism 13,11 through separately bellows and inside and outside secondary wind, and the direction of rotation of inside and outside secondary wind is identical.One time wind channel center is provided with central tube 5, one time wind straight length 6 is built-in with circular casing 3, annular flow path place between this sleeve pipe 3 and wind snout 1 inwall is provided with stabilizer 2, on near central tube 5 outer walls sleeve pipe 3 inlets, be provided with inspissator 4, breeze airflow can be divided into deep or light two parts, the thin powdered coal air communication is crossed sleeve pipe 3 internal channels, and the thick coal culm air-flow is then by annular flow path, the stabilizer 2 of flowing through.Adjusting can be moved by central tube 5 in the position of inspissator 4, to change concentrated effect, adapts to different coals.Referring to Fig. 2, because the effect of stabilizer 2, the thick coal culm airflow passes also becomes concavo-convex ring-type wave or zigzag jet thereafter, and high more the closer to trough 9 coal powder densities, dense breeze airflow directly enters the high-temperature region of big recirculating zone boundary vicinity, is formed with to be beneficial to the stable high temperature of pulverized coal flame, area with high mercury, steady combustion ability strengthens greatly, owing to be oxygen-depleted zone,, realize low NOx drainage herein so be very beneficial for suppressing the generation of NOx.Oil gun, burning torch that central tube 5 is built-in, in cold conditions ignition trigger process, directly firing coal-dust airflow realizes that the cold conditions few-oil ignition starts, and saves fuel oil.
Claims (6)
1. a vortex burner comprises the wind passage, interior secondary air channel (13), outer secondary air channel (10) three parts that are communicated with successively; A described airduct is communicated with a wind snout (1) through a wind straight length (6) by a wind inlet elbow (7), a described airduct center is provided with central tube (5), a described wind snout (1) locates to be built-in with sleeve pipe (3), it is characterized in that: in the described wind snout (1), annular flow path place between a sleeve pipe (3) and a wind snout (1) is provided with stabilizer (2), this stabilizer (2) is by being distributed on sleeve pipe (3) outer wall, vertically, the awl post (16) that raises gradually to a wind snout (1) direction height constitutes, the cylinder of described awl post (16) constitutes crest (8), and trough (9) is formed on two adjacent crest (8) awl intercolumniation bottoms; The outer wall of the central tube (5) of described sleeve pipe (3) porch is provided with inspissator (4), and this inspissator (4) is the ring bodies that is surrounded on the central tube (5).
2. vortex burner as claimed in claim 1 is characterized in that: the most significant end face of described awl post (16) is concordant with the vents face of a wind snout (1) or embed in the wind snout (1).
3. vortex burner as claimed in claim 1 or 2 is characterized in that: described inspissator (4) is that trace is the ring bodies that triangle or streamlined form around central axis.
4. vortex burner as claimed in claim 3 is characterized in that: the annular solid that the trace of described inspissator (4) forms for the sand dune shape.
5. vortex burner as claimed in claim 3 is characterized in that: described inspissator (4) is that the inspissator of regulating can be moved with central air hose (5) in the position.
6. vortex burner as claimed in claim 5 is characterized in that: described central air hose is provided with oil gun, burning torch, flame monitoring device in (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218917 CN2699136Y (en) | 2003-09-18 | 2003-09-18 | Vortex pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218917 CN2699136Y (en) | 2003-09-18 | 2003-09-18 | Vortex pulverized coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2699136Y true CN2699136Y (en) | 2005-05-11 |
Family
ID=34755099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03218917 Expired - Lifetime CN2699136Y (en) | 2003-09-18 | 2003-09-18 | Vortex pulverized coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2699136Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100567816C (en) * | 2007-12-25 | 2009-12-09 | 杭州意能节能技术有限公司 | A kind of eddy flow powdered coal burner lit up by tiny oil with center wind |
| CN102418923A (en) * | 2011-11-30 | 2012-04-18 | 华中科技大学 | Coal dust collector |
| CN102494337A (en) * | 2011-12-26 | 2012-06-13 | 上海锅炉厂有限公司 | Plasma oil-free ignition staged combustion system |
| CN102500551A (en) * | 2011-09-29 | 2012-06-20 | 华中科技大学 | Device for separating rough and fine coal powder in pipeline |
| CN103047657A (en) * | 2012-12-19 | 2013-04-17 | 上海巴安水务股份有限公司 | High-efficiency low NOx emission swirling burner and burning method thereof |
| CN103953924A (en) * | 2014-04-22 | 2014-07-30 | 东方电气集团东方锅炉股份有限公司 | Burner used for boiler |
| CN106287690A (en) * | 2016-08-08 | 2017-01-04 | 东南大学 | A kind of turbulent burner |
| CN109084296A (en) * | 2017-06-13 | 2018-12-25 | 山西昌德大成科技有限公司 | The built-in oxygen rifle of boiler using brown coal burner surely fires system |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
| CN114738755A (en) * | 2022-04-28 | 2022-07-12 | 西安交通大学 | Coal-ammonia mixed combustion burner for coal-fired boiler with four tangential corners |
| CN114877334A (en) * | 2022-04-28 | 2022-08-09 | 西安交通大学 | Ammonia gas and pulverized coal dual-fuel burner for industrial pulverized coal boiler |
-
2003
- 2003-09-18 CN CN 03218917 patent/CN2699136Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100567816C (en) * | 2007-12-25 | 2009-12-09 | 杭州意能节能技术有限公司 | A kind of eddy flow powdered coal burner lit up by tiny oil with center wind |
| CN102500551A (en) * | 2011-09-29 | 2012-06-20 | 华中科技大学 | Device for separating rough and fine coal powder in pipeline |
| CN102418923B (en) * | 2011-11-30 | 2013-12-25 | 华中科技大学 | Coal dust collector |
| CN102418923A (en) * | 2011-11-30 | 2012-04-18 | 华中科技大学 | Coal dust collector |
| CN102494337B (en) * | 2011-12-26 | 2014-04-09 | 上海锅炉厂有限公司 | Plasma oil-free ignition staged combustion system |
| CN102494337A (en) * | 2011-12-26 | 2012-06-13 | 上海锅炉厂有限公司 | Plasma oil-free ignition staged combustion system |
| CN103047657A (en) * | 2012-12-19 | 2013-04-17 | 上海巴安水务股份有限公司 | High-efficiency low NOx emission swirling burner and burning method thereof |
| CN103953924A (en) * | 2014-04-22 | 2014-07-30 | 东方电气集团东方锅炉股份有限公司 | Burner used for boiler |
| CN103953924B (en) * | 2014-04-22 | 2017-01-04 | 东方电气集团东方锅炉股份有限公司 | Combustor for boiler |
| CN106287690A (en) * | 2016-08-08 | 2017-01-04 | 东南大学 | A kind of turbulent burner |
| CN109084296A (en) * | 2017-06-13 | 2018-12-25 | 山西昌德大成科技有限公司 | The built-in oxygen rifle of boiler using brown coal burner surely fires system |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
| CN114738755A (en) * | 2022-04-28 | 2022-07-12 | 西安交通大学 | Coal-ammonia mixed combustion burner for coal-fired boiler with four tangential corners |
| CN114877334A (en) * | 2022-04-28 | 2022-08-09 | 西安交通大学 | Ammonia gas and pulverized coal dual-fuel burner for industrial pulverized coal boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130918 Granted publication date: 20050511 |